Pakistan Journal of Biological Sciences1028-88801812-5735orgz10.3923/pjbs.2003.1942.1944 Alternaria solani (Ellis and Mart) Jones and Grout and Pytophthora infestans (Mont.) De Bary under Field Conditions]]>ParvezEjazShahid HussainAbdul RashidM. Zafar Ahmad122003623Recommended doses (200-250 gm acre-1) of five protectant and eradicant fungicides viz Banko (Chlorothalonil) 500 Sc, Score (Difenoconazole) 250 Ec, AcrobatMZ 90/600 WP, Metalaxyl+Mancozeb) 72 WP and Ridomil Gold (Mancozeb+Metalaxyl) 68 WP were tested against early and late blight diseases development on ten potato advance lines/varieties sown in a randomized complete block design in the research area of a private farm at Chiniot. All the fungicides reduced disease severity on most of the lines/varieties significantly compared to untreated control. However the effect of Metalaxyl+Mancozeb (72 WP), Ridomil Gold (68WP), Score (250 EC) and Banko (500 Sc) was pronounced on tolerant or moderately resistant varieties/lines compared to moderately susceptible or susceptible varieties/lines. Genetic potential of such lines/varieties was greatly exploited by the application of these fungicides. Cultivations of resistant/moderately resistant varieties along with timely one or two sprays of these fungicides will be helpful to control these diseases.]]>1Ahmad, I. and J.I. Mirza,19952 mating type of Phytophthora infestans in Pakistan.]]>Proceeding of National Seminar on Research and Develpoment of Potato Production in Pakistan,1995pp: 2112192Anonymous,1985Phytophthora infestans) of Potato Disease Assessment for Crop Variety Trials.]]>Foliage Blight (Phytophthora infestans) of Potato Disease Assessment for Crop Variety Trials.3Anonymous,2002Literature and Sample of Fungicides: Acrobat MZ 90/600 g kgG1 WP for BASF.4Cooke, L.R., D.R. Clifford and M.E. Holgate,1981Phytophthora infestans) with systemic fungicides.]]>Pesticides Sci.,126786845Dahman, H. and T. Stanb,1992Venturia inaequalis, Cercospora arachidicola and Alternaria solani.]]>Plant Dis.,767747776Ghani, A., M. Sadiq, M. Habib, M. Shafiq and J. Iqbal,1995Proceedings of the National Seminar on Research and Development of Potato Production in Pakistan,1995pp: 3123167Khan, B.A., I. Haq, S. Iftikhar and M. Aslam,1985Pak. J. Bot.,171631638Matheron, M.E. and J.E. Matejka,1991Plant Dis.,752642689Mathur, R.S., B.K. Singh and M.S. Nagar Koti,1971Phytopathology,24586210Mohibullah,1995Alternaria solani and their effect on yield of potato (Abstr).]]>Studies on the efficacy of different spray fungicides on the control of early blight disease caused by Alternaria solani and their effect on yield of potato (Abstr).199511Reifshchneider, F.J.B., P. Furumoto and F.A.R. Rigueira,1984FAO Plant Prot. Bull.,32919412Rizvi, S.I.,1995Chemical control of early blight of potato (Abstr).199513Shtienberg, D. and W.E. Fry,1990Plant Dis.,7484985214Siddiqui, H.A., A.L. Khanzada and U.H. Usmani,1995Alternaria solani (Ell and Mart) Jones and Grout (Abstr).]]>Investigations on chemical control of early blight of potato caused by Alternaria solani (Ell and Mart) Jones and Grout (Abstr).199515Singh, B.K.,1971Indian Phytopathol,2440040116Singh, R.S.,1998Plant Disease.7th Edn.,pp: 686pp: 68617Steel, R.G.D. and J.H. Torrie,1980Principle and Procedures of Statistics: A Biochemical Approach.2nd Edn.,18Shuja, M.A.,1995Efficacy of different fungicides for the control of early and late blight (Abstr.).1995